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Table 3 Affinity for P uptake

From: Can differences in phosphorus uptake kinetics explain the distribution of cattail and sawgrass in the Florida Everglades?

Species Oxygen P Vmax/K0.5
(l g-1DW h-1)
α
(l g-1DW h-1)
Cladium High oxygen Low 2.43 ± 0.40 0.75 ± 0.17
   High 0.40 ± 0.22 0.28 ± 0.20
  Low oxygen Low 3.40 ± 0.27 1.44 ± 0.15
   High 0.86 ± 0.20 0.32 ± 0.07
Typha High oxygen Low 2.51 ± 0.35 0.84 ± 0.14
   High 1.63 ± 0.29 0.90 ± 0.25
  Low oxygen Low 7.25 ± 1.77 4.08 ± 0.50
   High 1.17 ± 0.13 1.05 ± 0.34
  1. Average (± SE, n = 4-8) ratio between Vmax and K0.5 as estimated by the modified Michaelis-menten model (Vmax/K0.5) and the slope of the initial part of the uptake curve (α) as a measure of the affinity for P uptake of Cladium mariscus spp. jamaicense and Typha domingensis plants acclimated to low and high P level (5 and 500 μg P l-1) and to aerated and low oxygen conditions (8.0 and <0.5 mg O2 l-1) in hydroponic culture solutions